Positive words on banks send stocks to biggest gain this year

Fed Chairman Ben Bernanke said regulators would "take any necessary and appropriate steps" to shore up the financial system. Citigroup (C) CEO Vikram Pandit said his company was profitable during the first two months of this year. And stocks rallied the most this year, as the Dow Jones Industrial Average climbed 379 points, or 5.8 percent, to 6,926.